4 6 



IV HEELER. 



[VOL. II. 



P. coarctata is a small ant, the male and female measuring 

 scarcely more than 4 mm. in length, while the workers vary 

 from 3 to 3.75 mm. 



According to Emery this ant occasionally presents ergatoid 

 females. He mentions 1 two of these wingless individuals from 

 Sicily, with eyes somewhat larger than those of the worker, 

 with ocelli and with the node somewhat higher and more slender 

 above. I have been unable to find any such specimens among 



my American mate- 

 rial, although I care- 

 fully scrutinized no 

 less than two hundred 

 wingless individuals 

 from widely separated 

 localities and from at 

 least twenty different 

 nests. 



P '. coarctata is the 

 most widely distrib- 

 uted of the Euro- 

 pean Ponerinae and 

 occurs even in north- 

 ern Africa (Algiers), 

 according to Emery. 2 

 In this country, too, 

 its subspecies, pcnn- 

 sylvanica, is one of the most widely distributed forms in the 

 subfamily. Emery 3 has examined specimens from Pennsyl- 

 vania, New Jersey, Virginia, Maryland, Mississippi, Florida, 

 and Ohio. Forel has observed it in North Carolina, 4 and I 

 can add to this list four other states, viz., Wisconsin, Illinois, 

 Massachusetts, and Connecticut. It may, I think, be safely 

 said to inhabit all the states east of the Mississippi, as well as 

 Canada. 



FIG. i. Ponera coarctata. Latr., subsp. pennsylvanica 

 Buckl. Male. 



1 " Sopra Alcune Formiche della Fauna Mediterranea," Mem. letta alia R. 

 Accad. delle Science dclT Istituto di Bologna. Pp. 1-19, Tav. I. 2\ Aprile, 1895. 



2 loc. fit., p. 6. 3 " Beitrage zur Kenntniss," etc., loc. cit., p. 268. 



4 Aniia/cs de la Soc. Entomol. de Belgiqite. Tome xliii, pp. 438-447. 1899. 



